Here is the full list of all 25 Creature in the Well achievements.
Charge 7 orbs at once
Heal a total of 1,000 health absorbed from anomaly balls
Find Phillip's prototype
Find all capes
Help Roger mop the floor
Let's play
Find all of Danielle's tools
Find the scavenger's hidden stash
Find all the lore
Save Mirage from the sandstorm
Fully upgrade the BOT-Core
Enter the Creature's well
Unlock the Weather Control Monolith
Generate a total of 2,000,000 power
Destroy 100 drones using EMPs
Unlock the Support Monoliths
Find a secret strike tool
Upgrade your BOT-Core
Activate the Power Reserves
Hit 20 bumpers with one shot
Generate 1,000 power in one hit
Find a secret charge tool
Get thrown out of the machine
Open the temple
Try to escape the sandstorm